<!doctype html>
<html lang="en">
<head>
	<meta charset="UTF-8">
	<title>Document</title>
</head>
<body>
<script>
	var boo = new Boolean(false)
	alert(boo.valueOf());		//	false

	var a = new Array('a','b','c','d');
	alert(a.valueOf());		//a,b,c,d

	var d = function(){alert(1111111)}		//	function (){alert(1111111)}
	alert(d);
</script>
</body>
</html>